According to Webster's Revised Unabridged Dictionary Version published 1913, regarding the noun form of jacket, "1. A short upper garment, extending downward to the hips; a short coat without skirts." This miniature's breastplate seems close enough to that description for me. :)

My thought for this miniature is to have the metallics stand-out, seeming the most concrete part, whereas everything else would be more ethereal. I hope to do that by painting the metal with metallic paint (something that I have only done once (poorly) on the first miniature I painted since returning to the hobby in 2006), whereas the rest of the miniature would be painted with an ethereal/moonlit style.